This is the 10102nd most frequent Japanese word.
適温
"Suitable temperature" or "optimal temperature."
適温 is used to describe the ideal temperature for consuming a particular beverage, in this case, tea, highlighting comfort and pleasantness.
このお茶は適温で、とても飲みやすいです。
This tea is at the optimum temperature, making it very pleasant to drink.
適温 refers to the specific temperature condition required for a particular process, here emphasizing the necessity during bread dough fermentation.
パン生地を発酵させるには適温が必要です。
To let bread dough rise, the appropriate temperature is necessary.
適温 is applied to suggest an appropriate setting for a device to maintain comfort, focusing on creating a conducive environment in a room.